Clearblue fertility monitor or ovulation sticks?

I have been ttc for 2 years now, have 4 more cycles before we start iui. Cycles vary from 30-35 days, all tests come back clear. Basically I am wondering is it worth me getting the clearblue fertility monitor as a last ditch attempt to get pregnant before iui? I know it's quite expensive but I'm not bothered about the money I just want a bfp!!!

Thanks, I used ovulation sticks before but from what I understand they only measure one hormone so can only detect your fertile 2 days, the monitor I think measures two hormones so can detect your most fertile 6 days. I'm not sure if that's correct though?!